Mu Canis Majoris

Updated on Dec 23, 2024

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Mu Canis Majoris (μ Canis Majoris, 18 Canis Majoris), also known as HR 2593 and BD-13°1741; is a quadruple star complex located in the constellation Canis Major. The multiple star is located at right ascension 06^h 56^m 06.65^s and declination −14° 02′ 36.4″. The brighter two components can be split in a small telescope.The star system is estimated to be 278 parsecs (910 light-years) from the Sun. The star has the traditional names Isida and Isis.

Mu Canis Majoris A (HD 51250)

(06^h 56^m 06.64589^s,−14° 02′ 36.3520″) A K3III giant star with a naked eye apparent magnitude of 5, and an absolute magnitude of -2.22. Mu Canis Majoris has a mass of 3.1 Solar masses. Mu CMa is about 390 times fainter than the brightest star in the night sky Sirius.

Mu Canis Majoris B (HD 51251)

(06^h 56^m 06.4^s,−14° 02′ 31″) A B9.5V star with an apparent magnitude of 7.6.

Mu Canis Majoris C (BD-13°1741 C)

(06^h 56^m 00.9922^s,−14° 02′ 08.861″) A star with an apparent magnitude of 10.2

Mu Canis Majoris D (BD-13°1741 D)

(06^h 56^m 13.0466^s,−14° 01′ 48.272″) a star with an apparent magnitude of 10.5

Mu CMa should not be confused with the 9th magnitude variable star MU CMa located near NGC 2360.

References

Mu Canis Majoris Wikipedia

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